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Re: PowerPC performance tuning
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: tm_gccmail at mail dot kloo dot net
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Mon, 03 Mar 2003 17:32:26 -0500
- Subject: Re: PowerPC performance tuning
>>>>> tm gccmail writes:
Toshi> What are the current problems with the first-pass scheduling
Toshi> heuristics? The SH port has the first pass disabled currently, but we
Toshi> would like to enable it - the load latency scheduling is extremely bad,
Toshi> currently.
We are seeing problems with the first scheduling pass
overspeculating and with if-conversion only considering insn count, not
insn costs.
David